Modular arithmetic, even when disguised as a rounding problem, can be just as simple, if not simpler. The technique discussed here works for any constant N , delivers solutions even when x has 32 or ...

One of my fellow contributors here recently wrote a post about leap years and why we have them. This reminded me of modular arithmetic and the formula for calculating the day of the week for any ...

Its readership is a mixture of school teachers, college and university lecturers, educationalists and others with an interest in mathematics. One of the world's leading journals in its field, it ...

Modulus: A condition imposed on algebraic cycles or presheaves, often reflecting additional structure or ramification conditions in arithmetic geometry.